Valve



R. FlscHBAcH Aug. 17

VALVE Filed June 30, 1925 Jp venior:

@cf/men F/S HBH c H Patented Ang; 17, 1926.

Y Units stares Pare-'r j oar-Fics mor-IARD FIsCHBAcH, or,r BERLIN, GERMANY.y

VALVE.v

Application niederen@ so, 1925, serial No.

Thepconstant increase'ot the steam pressure in modern steam plants has led to the employment of correspondingly decreasing diameters of the tubes for a given` output ofthe plant. In vattempting to designa valve ot the type described, for instance, in my U. S.' patent applications .498,516 and 690,032, which had originally been designedv for tubes having a diameter otaverafre value, for the use with tubes of a diameter which is essentially smaller such as are used in high-pressure steam plants, Ihave found that by employing the obvious principle of proportionally decreasing theI dimensions or" the valve. there will be the result, that Ifor important parts of the valve dimensions will be obtained which are impermissible in practice.

In order to design a high-pressure valve for small tube diameters according to my invention, I exchange the kinematic functions of certain operating members of the valve and more particularly of the spindle and the nuts or pressure members co-operating therewith, which Jform part ot the type of valve described in Vmy kabove-mentioned patent applications. n

According to my present invention 'the members, which carry the female thread. for receiving the pressure` spindle, are mountedV externally of the valve discs in such a Inanner that they may be rotated around their axis, `while being prevented against motion in their axial direction. These pressure members are connected tothe valve discs only by means of the pressure spindle.` The spindle L which is .non-rotatable and displaceable in axial direction. is` mounted in the non-rotatable but axially displaceable main valve discs, and `carries at both Vot its ends the balanced closing members of the valve which are of conical conformation.

In the drawing I have represented annexample or" the high-pressure valve constructed according to my present invention, Fig. l showing the essential parts of the valve in a vertical section, Fig. 2 beinga vertical cross-section through the center plane ot Fig. l, Fig. 3 representing a horizontal section through the center plane of Fig. 1. and Fig. l4 showing the closing member in the rform of a plate with the balancing or :equalizing member inserted thereinto.

The pressure spindle a is rigidly connected at its rear and front ends with the balancing' members c1. These membersA c1 carry pro- Ylar to that of said iianges c2.

ieee.

40,622, land Vin Germany AQctober 13,

jecting flanges c2.. as shown in Figs. 4,-.. The flanges a2 inthe openv positi n ot the valve,fas shownwill be pressed avainst the rim b2 Vot the main valve disc In'order that Vthe equalizing member al together .tith'itsl'anges c2' may bc intro'ducedinto the main valve disc recesses are provided the rimb2 oit said main valve platev b, said recesses being of a configuration simi- After having introduced the equaliZ-ing member t1 and critter av rotation of the-same by an angle of degreesagainst the main valve disc Y), he said recesses will be closed up by the projections c. The dimensions of the several partsare sol chosen, that the flanges c2 will rest with a small clearance within said projections'o. By rotating the pressure nuts Z which are provided with cranks serving for .and

i actuating the pressure spindle in the one or other sense of rotation, the Hanges a? will abut with' one of its radially positioned faces against the corresponding Jface of the projections c'. By this the pressure spindle a will be prevented from participating in the rotary motion. Each ofthe main valve discs l) contains a valve seat g in the well known'manner. AThis valve seat g is provided with properly formed recesses serving for the reception of the equalizing member al.' Interposed between the two cranks d carrying the female thread orthe pressure spindle a there is a pressure bearing, yas indicated-at c in Figs. l and 2, similar to@v the ypressure bearing used in the construction according to the above Vmentioned patent application 498,516.. Inv axial direction the two cranks d are held together by two pressure plates f, f, which are guided by means ot the two ledges 7L., 7L, irmly connected to the valve casing, Vas vshown in Fig. 8. The pressure mits d of the pressure spindles a are rotatably mounted within these pressure plates f, 1. The pressure nuts d will thus actuate the valve spindle in axial direction of the samepinorder to open the passage of the valve.

In all other respects the 'mode of operation ot the new valve accordingl to my present invention is exactly the same as that of the valve according to my U. S. patent appliicc lcation 498.516.

ymember in pressure valves having.` a passage ot small diameter, the essential advanpair ot pressure spindles,

tage is obtained, that the two-part pressure spindle will no more need to be held together by a bolt. By this the useful Crossseetion of the pressure spindle will be essentially increased. In addition to this there are other construe-,tional advantff" which enable the valve according to In; above tvo applications for patent to be adapted for smaller tube diameters, as above pointed out.

I claim:

l. A high pressure steam valve Comprisije' a easing` havin?,` valve seats,l a pair of Y l Talve dises eooneating Witn said seats, av

one ofwvhieh is situated in eaeh of said valve dises and non-rotatable but airiallj,7 displaeeable relaveljv thereto7 a balancing member inter posed betr-veen each of said pressure spindles and one of said valve dises, pressure nuts for actuating said pressure spindles to move said spindles ppositeljv7 and in axial directions and actuating means for said pressure nuts.

2. A valve as claimed in claim l havin g j eeting the valve each of the balancing membersV provided With projecting flanges and eaoh of the valve dises provided with recesses cooperating' With said flanges, and additional promembers lling a spaee left between dises and the balancing members after introduction oit the latter into the valve, said additional projecting members being adapted to prevent rotation of the balancing members and spindles relatively to the valve dises.

pressure bearing interposed betweel pressure nuts, pressure plates for hold-A said pressure nutstogether, and ledges provided on the easing, said ledges forming' guide for said pressure plates.l

ln testimonj,7 Wiereof l haverathxed my rture.

.ALL

nenn rrsoneaon. 

